1. (a) The state board finds the standards for exhaust emissions set forth in Table 1 to be the maximum allowable emissions of pollutants from light-duty (6,000 pounds or less gross vehicle weight) and medium-duty (8,500 pounds or less gross vehicle weight) gasoline-powered vehicles when inspected at California Highway Patrol roadside inspection lanes.

2. (b) The inspection shall consist of exhaust emission measurements from the vehicle with the air injection system (if any) connected. Hydrocarbon and carbon monoxide concentrations shall be determined by nondispersive infrared instrumentation.

   The idle mode test shall be performed with the transmission set in neutral gear with the engine at its normal operating temperature.

   Table 1 Highway Inspection Standards

   Emission

   Idle Standards^*

   Category Number

   Model Year

   Control System

3. No. of Cylinder

   HC PPM %

   CO

   1

   1955-1965

   5 or more

   800

   8.50

   2

   1966-1970

   with air injection

   5 or more

   450

   5.00

   3

   1966-1970

   without air injection

   5 or more

   550

   7.00

   4

   1971-1972

   with air injection

   5 or more

   300

   4.00

   5

   1971-1972

   without air injection

   5 or more

   450

   6.50

   6

   1973-1974

   with air injection

   5 or more

   200

   3.50

   7

   1973-1974

   without air injection

   5 or more

   450

   6.50

   8

   1955-1967

   4 or less

   1200

   8.00

   9

   1968-1970

   with air injection

   4 or less

   400

   5.50

   10

   1968-1970

   without air injection

   4 or less

   900

   7.50

   11

   1971-1972

   with air injection

   4 or less

   400

   5.50

   12

   1971-1972

   without air injection

   4 or less

   400

   6.50

   13

   1973-1974

   with air injection

   4 or less

   300

   4.50

   14

   1973-1974

   without air injection

   4 or less

   350

   6.50

   15

   1975+

   no catalyst

   ALL

   150

   3.00

   16

   1975+

   catalyst without air injection

   ALL

   200

   4.00

   17

   1975+

   catalyst with air injection

   ALL

   100

   1.00

   18

   1975+

   three-way catalyst

   ALL

   80

   1.00

   __________

   ^* HC (ppm) is defined as hydrocarbons in parts per millions of hexane by volume and CO (%) is defined as carbon monoxide in percent by volume.

Note: Authority cited: Sections 39600, 39601 and 43101, Health and Safety Code; and Sections 27157 and 27157.5, Vehicle Code. Reference: Sections 39002, 39003, 39500, 43000 and 43101, Health and Safety Code; and Sections 27157 and 27157.5, Vehicle Code.

History

1. Amendment of Note filed 3-16-77; effective thirtieth day thereafter (Register 77, No. 12). For prior history, see Register 75, No. 21.

2. Amendment filed 11-30-83; effective thirtieth day thereafter (Register 83, No. 49)